Zmija A, Deiml P, Malyshev D, Zink A, Anton G, Michel T, Funk S (2020)
Publication Type: Journal article
Publication year: 2020
Book Volume: 28
Pages Range: 5248-5256
Journal Issue: 4
DOI: 10.1364/OE.28.005248
The challenge of astronomical intensity interferometry is to detect the small photon-bunching signals of distant sources with a broad optical bandwidth. We have built a Hanbury Brown-Twiss-like laboratory intensity interferometer with a focus on a relatively broad bandwidth (1 nm FWHM optical filter) and high photon rates (up to 10 MHz) per channel compared to typical (non-astronomical) intensity interferometry applications. As a light source we use a green LED to simulate starlight. The LED has proven to be a compact high-power source of stochastic light with a special advantage of a small emission area, which favours spatial coherence. Using single-photon correlations, we detect a bunching signal in the second-order correlation function with a coherence time of <1 ps and an amplitude of <4 · 10−4 and describe signal and background quantitatively for a 40 hours measurement. In this paper we show our setup, present the correlation measurements and compare them to theoretical expectations.
APA:
Zmija, A., Deiml, P., Malyshev, D., Zink, A., Anton, G., Michel, T., & Funk, S. (2020). LED as laboratory test source for astronomical intensity interferometry. Optics Express, 28(4), 5248-5256. https://dx.doi.org/10.1364/OE.28.005248
MLA:
Zmija, Andreas, et al. "LED as laboratory test source for astronomical intensity interferometry." Optics Express 28.4 (2020): 5248-5256.
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